Open AccessFormation of Multiple Networks in Cis-1, 4-Polybutadiene: Dynamical Viscoelasticity, Gel Content and Cross-Link Density
Author(s) -
Junxue Zhai,
Xiang Li,
Jinting Zhai,
Ping Zhang,
Shugao Zhao
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/774/1/012053
Subject(s) - polybutadiene , cross link , viscoelasticity , materials science , sulfur , curing (chemistry) , natural rubber , modulus , dynamic mechanical analysis , composite material , polymer chemistry , percolation (cognitive psychology) , elastomer , polymer , copolymer , neuroscience , biology , metallurgy
The formation of multiple networks of cis-1, 4-polybutadiene rubber (BR) with sulfur and carbon black (CB) were discussed by analysing the curing curve, gel content, cross-linking density (XLD) and dynamic viscoelasticity. XLD and gel test show the network from chains entanglement and sulfur cross-link existing in unfilled BR, in addition there is another network from CB in filled BR. Networks from sulfur and CB cross-links has two different peaks of loss modulus ( G” ) and loss tangent at different dynamic strain. Furthermore, the average bonding number of each chain to form the network is calculated from the sulfur cross-link density. There is two percolation of G‘ 0.01Hz or gel content as the average bonding number increased in curing.